IE8的谷歌地图.setmap问题

我在这里遇到了一点问题。此脚本在除IE8以外的所有浏览器中都可以正常工作

调用route()函数，并给出一个Google maps编码的多边形和折线。每次IE8尝试执行setMap

我认为这个问题与地图超出了它的范围有关?或者后面的逗号错误?我刚刚花了几个小时玩这个，但我无法修复它。

有什么想法?感谢。通常不喜欢粘贴整个代码，因为它有点势不可挡，但它是需要在这种情况下。

var markersArray = [];

function initMap(lat,lng) {
    if(lat) {
        var myLatLng = new google.maps.LatLng(lat, lng);
        var zoomi=13;
    }else{
        var myLatLng = new google.maps.LatLng(54.162434, -2.285156);
        var zoomi=5;
    }
    var myOptions = {
        zoom: zoomi,
         zoomControl: true,
        panControl: false,
       streetViewControl: false,
       zoomControlOptions: {
            style: google.maps.ZoomControlStyle.LARGE,
            position: google.maps.ControlPosition.LEFT_CENTER
     },
        center: myLatLng,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    }
    map = new google.maps.Map(document.getElementById("map"), myOptions);
}

function route(journeyPolyy,journeyLine,startLat,startLng,endLat,endLng) {
reset();
    var startLatLng=startLat + ',' + startLng;
    var start = new google.maps.LatLng(startLat,startLng);
    var end = new google.maps.LatLng(endLat,endLng);
    var decodedPath = google.maps.geometry.encoding.decodePath(journeyLine);
      var flightPath = new google.maps.Polyline({
        path: decodedPath,
        strokeColor: 'blue',
        strokeOpacity: 0.5,
        strokeWeight: 5
      });
    markersArray.push(flightPath);
    flightPath.setMap(map);
     var marker = new google.maps.Marker({
        position: start
    });
    markersArray.push(marker);

    marker.setMap(map);
     var endPpoint = new google.maps.Marker({
        position: end
    });
    markersArray.push(endPpoint);

    endPpoint.setMap(map);
    poly = journeyPolyy.replace(/''''/g,"''");
    var decodedPath = google.maps.geometry.encoding.decodePath(poly);
    var decodedLevels = decodeLevels("BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB");
    var setRegion = new google.maps.Polygon({
        path: decodedPath,
        levels: decodedLevels,
        strokeColor: "#FF0000",
        strokeOpacity: 0.8,
        strokeWeight: 1,
        fillColor    : '#FF0000',
        fillOpacity  : 0.1,
        map: map
    });
    setRegion.setMap(map);
    markersArray.push(setRegion);
        var obj= document.getElementById('map');
    obj.style.visibility='visible';
    HideContent('mainContent');
    map.setCenter(start); 
    map.setZoom(13); 
}

function decodeLevels(encodedLevelsString) {
    var decodedLevels = [];
    for (var i = 0; i < encodedLevelsString.length; ++i) {
        var level = encodedLevelsString.charCodeAt(i) - 63;
        decodedLevels.push(level);
    }
    return decodedLevels;
}
function reset() {
  if (markersArray) {
    for (i in markersArray) {
      markersArray[i].setMap(null);
    }
    markersArray.length = 0;
  }
}